Diestock



"r. PETERSEN Feb. 25, l 930.

DIE STOCK Filed Aug. 6, 1924 1 a BMW ZMAMM whoa/my Patented Feb. 25,1930 "THO VA LD PE ERsEN,

Car-

clamping or securing means stocks.

' for-the die andwith the, plate frictionally i it. th top 11 willengage UNI D STATES PATENT-OFFICE or ERIE, PENNS LVANIA, AssIGNoR 'roREED ING COMPANY, 0 ERIE, PENNSYLVANIA, A-ooRPoR 'rIoN 0 PE s nvANIAMANUE QTU niEsroex Application filed August @1924. Serial No. 730,439.

Diestocks are usually provided with a seat a main plate for holding thedie in the seat. This is particularly true of the'solid die head. Toremove or change the die it has been customary tohave a large plate witha slotted opening which could be swung over the die and clamped by meansot a screw operating in the slotted opening.- 1 This is an inconvenientconstruction and one The requiring some time in its operation. presentinvention is deslgned to lmprove-the for dies n die 1 marks the head,and 2 the guide plates forming the seat for the die 3,

the die having the usual cutting faces 4.

Clamping plates 5 are arranged at opposite sides of the die. These aremounted on screws 6 which are secured in the screw-threaded opening 7 inthe head. The screws have the nurledheads 8. r

'The screws are, so arranged and the plates so positioned and of suchsize that when the plates are turned in one direction as shown n Fig. 1the ends'of the plates overlap the'die and by setting clamped in place.

quarter turn as shown in dash lines in Fig. 1 I

down the screw the die is lVhen the plate is turned a.

it is removed from the die so that the die can "be readily removed. v

In order to facilitatethisjmoveinentl have secured to the screw- I sothat as the, screw is turned the plate turns i-with it. a To 'accomplish'thisa spring 9 is mounted on the'screw the spring-being some of thewraps of so thatit isa'ssembled'by screwing A stop. 11. ispositioned toengage the plate 5 when turned in either direction. When the screwisturned to the right so as to tighten tion against the stop 11, dashposition as shown in new die/is in place all that is neeessaryis tovturn the screw in the direction to tighten" loosening direction freefromthe screw so as to r exert pressure on the plate and the final-wrap Iofthejjspring 10 being slightlysmaller than I the screw 7 the screwiintothefinal wrap 10 thus holding the spring in-place.

the platein position t overlap the die andclamp it. When.

the die the [frictional engagement of spring will carry the plate aroundto a posiwhich will he the it and the plate is again swung into positionover the die and clampedwith the same turningmovement. r f

What I claim as new is I 1. In a die stock, the combination of aheadhaving a die seat therein; a clamping plate;

'arotative screw on which the plate ismounted, said clamping platehaving dimensions clearing the die when swung to one position 7 die whenswung to and extending over the the screw is loosenedor turned totheleft as soon as the clamping plate is released from the Fig.1. WVhen aanother position, saidscrew having frictional Y engagement;with theplate and moving the plate into and out ofengagement with a die on theseat as the screw is turned; and a stop limiting the swinging movementof the plate to position the plate on and off the die.

a'rotative screw on 'ed sa d clamp ng'plate having dimensions a In adiestock, the combination of ahead. having a die seat therein; a olampingplate;

which the plate is mountp clearing the die when swung to one position Iand extending over the die whenv swung to another positiomsaid screwhaving frictional" engagement with the plate" and moving the.

plate into and out of engagement witha die.

on the-seat as the screw is turned, the turning I s of the screw in atightening direction swinging the plate into engagement and clamping thesame and the turning of v loosening turning the same outof engagementwith'a die; and a stoplimiting the swinging move- 'ment of the platetO'positiOn the plate on and 0 off thedie;

.In testimony whereof l have hereuntoset THORVALD PE ERS N my hand;

the screw in a the plate and

